JP2000180057A - Agitation structure of carbonizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the agitation structure of a carbonizer which can prevent processing material from becoming a large mass within a carbonizing furnace and can carbonize it with less energy in a short time. SOLUTION: This structure is equipped with a carbonizing furnace 14 which has a heat source, and an agitation member 22 which has a rotary shaft 24 extending roughly vertically within the carbonizing furnace and an agitation part 26 stretched out toward the wall face on furnace side of the carbonizing furnace 14 from the rotary shaft 24. For the rotary shaft 24, the top is coupled with a motor 30 through a universal joint 28, and the bottom constitutes a free end, and this structure is provided with a rotary plate 36 which limits the displacement of the free end of the rotary shaft 24, at the bottom of the carbonizing furnace 14, and the axis of rotation of the rotary shaft 24 of the agitation member 22 fluctuates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirring structure of a carbonizing device for carbonizing a processing material such as garbage.

[0002]

2. Description of the Related Art Conventionally, as a stirring structure of a carbonization apparatus of this kind, there is one described in, for example, JP-A-8-189762.

[0003] The carbonizing apparatus described in this publication includes a carbonizing furnace having a heat source, and a stirring blade having a stirring shaft extending in a substantially vertical direction in the carbonizing furnace, and a stirring body and a blade extending horizontally from the stirring shaft. Have. When processing materials such as garbage crushed to a certain size in advance are fed into the carbonization furnace and the carbonization furnace is heated while rotating the stirring shaft of the stirring blade,
The material to be treated in the carbonization furnace is stirred by the stirring blade, uniformly contacted with the wall surface of the carbonization furnace, and heated. Thus, the processing material is pyrolyzed and carbonized.

[0004]

However, in such a conventional agitating structure of a carbonizing apparatus, the movement of the agitating blades is stationary, so that the processing material adhering to the furnace side wall surface is solidified without being agitated. There is a problem of getting it.
In particular, when the sugar content of the processing materials is high, they tend to adhere to each other to form large lumps. Carbonization is possible even if the lump becomes large, but it takes time to heat the inside of the lump, and it takes a lot of time and energy to carbonize the entire processing material, resulting in a problem that costs increase. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a stirrer structure of a carbonizing apparatus which can carbonize in a short time with less energy. And

[0006]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present invention provides a carbonizing furnace having a heat source, a rotating shaft extending substantially vertically in the carbonizing furnace, and a rotating shaft. A stirrer having a stirrer projecting from the shaft portion toward the furnace side wall surface of the carbonization furnace. The rotation axis of the shaft portion is not fixed but is varied.

[0007] Since the stirring member scrapes off the processing material adhered to the furnace side wall surface of the carbonization furnace by changing the rotation axis of the rotating shaft portion, the entire processing material is uniformly stirred, and the processing materials adhere to each other and become large. Prevent clumping.

According to a second aspect of the present invention, in the first aspect, an upper end of the rotary shaft is connected to a rotary drive source via a flexible joint, and a lower end of the rotary shaft is connected to a free end. And a limiting member for limiting displacement of a free end of the rotating shaft portion is provided at a bottom portion of the carbonizing furnace.

By restricting the displacement of the free end of the rotating shaft by the limiting member, the rotating shaft is varied irregularly.

According to a third aspect of the present invention, in the second aspect of the present invention, the stirrer further includes a protrusion protruding upward from the bottom of the carbonization furnace or a recess protruding downward from the bottom. And a recess or projection for receiving the projection or recess is formed.

The protrusion and the recess are fitted to each other, and the fitting between them limits the displacement of the rotary shaft.

According to a fourth aspect of the present invention, in the third aspect, the projecting portion projecting upward from the bottom of the carbonization furnace rotates while maintaining a gap between the projection and the bottom of the carbonization furnace. A rotating plate, wherein the rotating plate and the stirring member rotate in opposite directions to each other.

By rotating the rotating plate, the water in the carbonizing furnace can be discharged from the gap between the bottom of the carbonizing furnace and the rotating plate without causing clogging. By rotating the rotating plate and the stirring member in opposite directions, all the processing materials can be stirred by the stirring member without the processing material remaining on the rotating plate.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall view showing an entire configuration of a carbonizing apparatus according to the present embodiment. A carbonizing apparatus 10 mainly includes a hopper 12 into which a processing material such as garbage is charged, and a hopper 12. A carbonization furnace 14 connected via an inlet pipe 13 for carbonizing the processing material, a pressure control device 16 connected from the carbonization furnace 14 via a conduction pipe 15 and maintaining the pressure of the carbonization furnace 14 constant, Exhaust device 17 connected to pressure control device 16 via exhaust pipe 19 to process exhaust gas from carbonization furnace 14
And a vacuum pump 18 connected to the exhaust device 17 via a valve (not shown) for transporting the processing material. V1 and V2 are valves provided on the inlet pipe 13 and the exhaust pipe 19, respectively. Incidentally, the carbonization furnace 14 is covered with a heat insulating cover shown by a virtual line in FIG.

The carbonization furnace 14 has a heater 20 as a heat source around the outer periphery of the furnace side wall.
A stirring member 22 for stirring the processing material is provided.
As shown in detail in FIG. 2, the stirring member 22 is
4 and a rotating shaft 24 extending in a substantially vertical direction.
And a stirrer 26 projecting toward the furnace side wall of the carbonization furnace 14 from the furnace. In detail, the stirring section 26 has a plate-like wing plate 26a extending to both sides around the rotation shaft 24 at the lowermost end, and a plurality of stirring rods 26b, 26c extending to both sides around the rotation shaft 24, 26d. Stirring rod 2
6b is substantially at the same height as the wing plate 26a,
c and 26d are sequentially positioned in the higher order. The stirring rods 26b and 26c extend in directions different from the blades 26a by 90 degrees, and the stirring rods 26d extend in the same angular direction as the blades 26a. Therefore, when the entire blade plate 26a and the stirring rods 26b, 26c, 26d are viewed from above, a cross shape is formed (see FIG. 4). Wing plate 2
6a, the tips of the stirring rods 26b, 26c, 26d should preferably protrude as close as possible to the furnace wall surface of the carbonization furnace 14, but they interfere when the furnace wall surface undergoes thermal deformation and is bent inside the furnace. In order to avoid this, the total length of the blade plate 26a and the stirring rods 26b, 26c, 26d is set smaller than the inner diameter of the carbonization furnace 14.

The rotary shaft portion 24 is provided with a universal joint 28 which is a flexible joint which can be freely bent by an appropriate amount while transmitting a rotational force, above the stirring rod 26d.
The upper end of the rotating shaft portion 24 is connected to the output shaft 30a of the motor 30, which is a rotation driving source, via the shaft. The motor 30
It is installed above the carbonization furnace 14.

As shown in detail in FIG. 3A, the lower end of the rotating shaft 24 is a free end, and the bottom surface of the blade plate 26a at the lowermost end of the rotating shaft 24 is A concave portion 26a1 which is concave with respect to the bottom of the carbonizing furnace 14 is formed. As shown in detail in FIG. 3B, a pair of protrusions 26b are provided on the bottom surface of the lowest stirring bar 26b.
1, 26b1 protrudes toward the bottom of the carbonization furnace 14, and the space between the pair of protrusions 26b1, 26b1 is a recess 26b2 that is concave with respect to the bottom of the carbonization furnace 14.

A second motor 32 is provided below the bottom of the carbonization furnace 14, and a second rotating shaft 34 is connected to an output shaft of the second motor 32. The second rotating shaft 34 penetrates the bottom of the carbonization furnace 14, and a rotating plate 36 is fixed to an upper end of the second rotating shaft 34. The rotating plate 36 (projection) projects upward from the bottom of the carbonizing furnace 14, and is provided between the rotating plate 36 and the bottom of the carbonizing furnace 14.
A slight gap 38 is formed. By the rotation of the rotating plate 36, moisture generated from the processing material is discharged to the pressure control device 16 through the drain pipe 42 (see FIG. 1) without clogging from the gap 38. ing.

The recess 26a1 of the wing plate 26a of the stirring member 22 and the recess 26b2 of the stirring rod 26b receive a rotating plate 36 projecting upward from the bottom of the carbonizing furnace 14. A small gap 40 is also formed between the rotary plate 36 and the concave portion 26a1 and between the rotary plate 36 and the concave portion 26b2, and the lower end of the rotary shaft portion 24 swings about the universal joint 28 by the amount of this gap. You can move. Thus, the rotating plate 36 functions as a limiting member that limits the swing range of the rotating shaft 24.

The operation of the carbonizing apparatus 10 configured as described above will be described below.

First, a processing material such as garbage which has been crushed to a certain size in advance is put into the hopper 12, the valves V1 and V2 are opened, and valves not shown are switched so that the vacuum pump 18 is evacuated. 17 is connected. Then, when the vacuum pump 18 operates, the exhaust device 17, the exhaust pipe 19, the pressure control device 16, the conduction pipe 15
Then, the suction is performed, and the processing material is vacuum-transported through the feed pipe 13 and fed into the carbonization furnace 14.

When the feeding into the carbonizing furnace 14 is completed, the valves V1 and V2 are closed. The carbonization furnace 14 is heated by the heater 20, and the stirring member 22 and the rotating plate 36 are rotated by the driving of the motor 30 and the second motor 32. The stirring member 22 and the rotating plate 36 are rotated in opposite directions. In this way, the processing material on the rotating plate 36 does not remain forever, and the stirring member 2
It is dispelled by the second blade 26a and circulated upward by the stirring rod 26b.

Thus, the processing material 46 is supplied to the stirring member 22.
While being roughly stirred in the carbonization furnace 14, while roughly drawing a mortar shape as shown by the dotted line in FIG. 2, the carbonization furnace 14 comes into contact with the furnace side wall surface and heat is transferred there to be heated.
In this stirring, the stirring member 22 is provided with the universal joint 28, and the lower end thereof is a free end. Therefore, the rotation axis of the rotation shaft portion 24 of the stirring member 22 is not fixed, but always fluctuates. I have. In particular, the rotation plate 36 serving as a restricting member interferes with the concave portions 26a1 and 26b2 provided in the 90-degree direction of the rotary shaft portion 24 so as to limit the displacement of the lower end.
The lower end of the rotary plate 36 is rotated by
Prevents the displacement. Rotating plate 36 and recess 26a
1. When the clearance between the recess 26b2 is reduced, the rotation shaft 2
4 becomes fine and irregular (indicated by phantom lines in FIG. 4), giving small vibrations to the tips of the blades 26a and the stirring rods 26b, and the processing material 46 attached to the furnace side wall surface of the carbonization furnace 14.
Is effectively scraped off to prevent the processing materials 46 from adhering to each other to form a large lump. In this way, the processing material 46 is heated without being formed into a large lump, and the heat is efficiently transmitted to the inside.

Until the processing material reaches the boiling point of water, the carbonizing furnace 14 is kept in a sealed state with the valve V2 closed, and the pressure control device 16 controls the inside of the carbonizing furnace 14 at a constant pressure higher than the atmospheric pressure. It has become. Thus, by pressurizing the processing material, it is possible to 1) shorten the time required to reach the boiling point, 2) reduce the temperature difference between the surface and the inside of the processing material, and 3) directly squeeze out moisture from the processing material. .

After the processing material reaches the boiling point, the valve V2
Open and release to atmospheric pressure. The exhaust gas generated from the carbonization furnace 14 is sent from the exhaust pipe 15 to the exhaust device 17, where the odor, carbon dioxide, dioxin, and the like contained in the exhaust gas are almost completely removed, and then discharged to the atmosphere. .

Thereafter, heating and stirring are continued,
When the material to be treated is at the spontaneous carbonization start temperature (about 160 to 185
C), the heating and stirring are stopped. When the temperature reaches the spontaneous carbonization start temperature, the carbonization proceeds spontaneously due to thermal decomposition, and the temperature of the processing material increases without heating, leaving carbide in the form of fine particles.

[0028] In this way, it is possible to obtain a carbide which is much smaller than the material before the carbonization. Therefore, when the processing material is garbage, the processing amount of a waste disposal company or a local government can be greatly reduced, and the transportation cost, the processing amount, and the cutting can be reduced.

[0029]

As described above, claims 1 to 4
According to the described invention, the rotation axis of the rotation shaft portion of the stirring member is not fixed, but is varied, whereby the processing material attached to the furnace side wall surface of the carbonization furnace can be effectively scraped off, It is possible to prevent the processing materials from sticking to each other and forming a lump in the carbonization furnace. In this way, the processing material is prevented from becoming a large lump, so that carbonization can be performed in a short time with a small amount of energy, and the cost can be reduced.

According to the second aspect of the present invention, by providing a limiting member for limiting the displacement of the free end of the rotating shaft at the bottom of the carbonization furnace, the rotating shaft limited by the limiting member is irregular. And the scraping is effectively performed.

Further, according to the third aspect of the present invention, an irregular displacement can be generated in the rotary shaft by the fitting of the projection and the recess.

According to the fourth aspect of the present invention, the water in the carbonizing furnace can be discharged from the gap between the bottom of the carbonizing furnace and the rotary plate. By rotating the protrusion as a rotating plate, water can be discharged without causing clogging. Furthermore, by rotating the rotating plate and the stirring member in opposite directions, all the processing materials can be stirred by the stirring member without the processing material remaining on the rotating plate.

[Brief description of the drawings]

FIG. 1 is an overall view illustrating an overall configuration of a carbonizing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of a carbonization furnace of the carbonization apparatus of FIG. 1, and (a) and (b) are cross-sectional views as viewed on a perpendicular vertical plane.

FIG. 3 is an enlarged sectional view of a bottom portion of the carbonization furnace of FIGS. 2 (a) and 2 (b).

FIG. 4 is a view taken along line 4-4 in FIG. 3 (a).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Carbonization apparatus 14 Carbonization furnace 22 Stirring member 24 Rotating shaft part 26 Stirring part 26a1 Depression 26b2 Depression 28 Universal joint (flexible joint) 30 Motor (rotation drive source) 36 Rotating plate (projection part, restriction member)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akio Mito 2-16-46 Minami Kamata, Ota-ku, Tokyo Inside Tokimec Co., Ltd. (72) Inventor Osamu Hayakawa 2--16-46 Minami Kamata, Ota-ku, Tokyo Stock (72) Inventor Seiichi Kino 4-13-13 Shibaura, Minato-ku, Tokyo 1609 Shibaura Design Office F-term (reference) 3L113 AC03 AC08 AC23 AC45 AC46 AC54 AC57 AC58 AC63 AC67 AC72 AC73 AC79 BA01 CA04 CA16 CB02 CB05 CB28 CB29 CB34 DA02 DA05 DA06 DA10 DA26 4D004 AA03 AB07 CA26 CB09 CB27

Claims (4)

[Claims] A stirrer comprising: a carbonization furnace having a heat source; a rotating shaft extending substantially vertically in the carbonizing furnace; and a stirring member extending from the rotating shaft toward a furnace side wall surface of the carbonizing furnace. And a stirrer structure of the carbonization device for stirring the processing material in the carbonization furnace by the stirrer, wherein the rotation axis of the rotation shaft portion of the stirrer is not fixed but is varied. . 2. The rotary shaft has an upper end connected to a rotary drive source via a flexible joint, a lower end serving as a free end, and a free end of the rotary shaft at the bottom of the carbonization furnace. The agitating structure for a carbonizing apparatus according to claim 1, further comprising a limiting member that limits displacement of the carbonizing device. 3. The restricting member is a protrusion protruding upward from the bottom of the carbonization furnace or a recess protruding downward from the bottom. The lower end of the stirring member has a recess or protrusion receiving the protrusion or recess. 3. A stirring structure for a carbonizing device according to claim 2, wherein 4. A protruding portion projecting upward from a bottom of the carbonization furnace is a rotating plate that rotates while maintaining a gap between the bottom of the carbonization furnace and the rotating plate and the stirring member. The stirring structure for a carbonizing device according to claim 3, wherein the stirring device rotates in an opposite direction.